Comparison

Light Spectrometer Wavelength vs IDEA

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Light Spectrometer Wavelength

This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.

Highlights
  • Measures dominant wavelength (nm)
  • Measures frequency (THz)
  • Measures period length (fs)
  • Real-time measurement
  • Save measurements with notes
  • Optional calibration
Features
Read full description

Measures light spectrum to determine the dominant wavelength in nm, frequency in THz and period length in fs. DOMINANT WAVELENGTH Dominant wavelength is a concept commonly used in the field of color science and perception. It refers to the wavelength of light that appears most prominent or dominant in a given color mixture or light source. In other words, it is the wavelength that our eyes perceive as the primary color in a mixture of different wavelengths. For light with only one wavelength, such as the light from a colored LED, the dominant wavelength corresponds to the wavelength of that light. KEY FEATURES • High accuracy • Real-time measurement • Measures light wavelength in nanometers (nm) • Measures light frequency in terahertz (Thz) • Measures light period length in femtoseconds (fs) • Easy to use • Save measurements with notes • Supports 40 languages, including english • Optional calibration for enhanced precision MEASURING 1. Find a white surface, such as a plain piece of white paper 2. Point your camera at the surface illuminated by your target light source 3. The app gives you accurate measurements in real-time LIMITATIONS Smartphone cameras have limitations when it comes to distinguishing between different very short, or very long wavelengths. More specifically, on many devices the accuracy below 465 nm and above 610 nm is very limited. This is due to the physical camera sensors in the devices. An automatic warning appears on the screen for these short and long wavelengths. WHITE LIGHT Note that is not meaningful to measure the dominant wavelength of white light as white light consists of a wide range of wavelengths, with no wavelength dominating. This app is made for measuring colored light. If you are interested in determining the color temperature of white light, please instead use our popular White Balance Kelvin Meter app. COLOR OF SURFACES If you want to measure the color of a surface or material, rather than of light, please instead use our popular Colorimeter Camera Color Meter app. Privacy Policy, https://spectrometer.contechity.com/pp.html End User License Agreement, https://spectrometer.contechity.com/eula.html CONTACT I value your feedback. Email me at apps@contechity.com with any suggestions or questions. Download the Spectrometer now!

About

IDEA

This intelligent operation app allows users to customize product usage and expand functionality. It provides a convenient way to interact with specific company products and gain a deeper understanding of their features.

Highlights
  • Intelligent operation
  • Product customization
  • Expandable functions
  • Enhanced product understanding
  • Convenient user interface
Features
Read full description

This software is a newly launched intelligent operation APP, aimed at providing users with more convenient operation methods and also allowing customers to have a better understanding of this product. APP can expand more functions and enable users to customize product usage. It is worth noting that the software is only applicable to our company's products

Screenshots

Light Spectrometer Wavelength4 screens
IDEA3 screens

Verdict

The call

The clearest difference is rating: IDEA at 5.0 against Light Spectrometer Wavelength's 4.2. IDEA also leads on in-app purchases (none vs 7) and iOS requirement (12.0 vs 15.0). Light Spectrometer Wavelength's advantage is ratings volume (92 vs 1) and review sentiment (72% vs 50%). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Light Spectrometer Wavelength sells 4 in-app purchases, starting at $0.99 per month. IDEA asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

IDEA holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Light Spectrometer Wavelength has 92 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 72% of Light Spectrometer Wavelength's written reviews are positive against 50% of IDEA's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Light Spectrometer Wavelength ships an update every 2 months, IDEA every 6 months. The most recent releases landed on September 22, 2026 and September 2, 2026 respectively.

Scorecard7 real differences · 3 level
Light Spectrometer Wavelength versus IDEA: the parameters behind the verdict, then further details
ParameterLight Spectrometer WavelengthIDEA
PriceFreeFree
Rating4.2 (92 ratings)5.0 (1 ratings) — better
Positive reviews71.9% of reviews — better50.0% of reviews
Number of ratings92 — better1
Update frequencyEvery 2 months — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size43 MB43 MB
Age rating4+4+
DeveloperContechity AB和平 陈

Customer experience

Light Spectrometer Wavelength

All ratings92 ratings
Positive80.4%
Neutral3.3%
Negative16.3%
Written reviews32 reviews
Positive71.9%
Neutral3.1%
Negative25.0%

IDEA

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

4 purchases

Light Spectrometer Wavelength

Subscriptions3
  • Full Access7 Days trial$0.991 Month
  • Full access14 Days trial$0.991 Month
  • Full access$4.991 Year
One-time1
  • Full access4 variants$6.99
None

IDEA

No in-app purchases

Questions

Is Light Spectrometer Wavelength free?
Light Spectrometer Wavelength is free to download, with in-app purchases available.
Is IDEA free?
IDEA is free to download, with no in-app purchases.
Which has better reviews, Light Spectrometer Wavelength or IDEA?
IDEA is rated higher. Light Spectrometer Wavelength averages 4.2 out of 5 from 92 ratings, while IDEA averages 5.0 from 1 ratings.
Do Light Spectrometer Wavelength or IDEA have ads?
Neither Light Spectrometer Wavelength nor IDEA shows ads.
Which is updated more often, Light Spectrometer Wavelength or IDEA?
Light Spectrometer Wavelength ships an update every 2 months, and IDEA every 6 months. Most recently, Light Spectrometer Wavelength was updated on September 22, 2026 and IDEA on September 2, 2026.

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